How do MP4 and MKVcompare? Here's everything you need to know to choose the right format — and how to convert between them.
MPEG-4 Part 14
MP4 is the most widely used video format in the world. It's the default for everything from YouTube to TikTok, smartphones to streaming services. If you need one video format that works everywhere, MP4 is it.
Matroska Video
MKV is the most flexible video container format available. It can hold virtually any codec and supports unlimited audio tracks, subtitles, and chapters. It's the format of choice for high-quality video enthusiasts.
| Specification | MP4 | MKV |
|---|---|---|
| Full name | MPEG-4 Part 14 | Matroska Video |
| Extension | .mp4 | .mkv |
| MIME type | video/mp4 | video/x-matroska |
| Category | Video | Video |
| Developer | ISO / Moving Picture Experts Group | Matroska.org |
| Year introduced | 2001 | 2002 |
MP4 is the universal standard — it works everywhere. MKV has its niche: movie collections and media servers. When in doubt, convert to MP4 for maximum compatibility.
Need to switch formats? Convert for free with SquishConvert.